Anti-malware platform update for Windows Defender in Windows 8 and Windows RT

Applies to: Windows 8.1 EnterpriseWindows 8.1Windows 8.1 Pro More

Summary


This anti-malware platform update for Windows Defender updates Windows Defender services, drivers, and UIs.

Microsoft regularly releases anti-malware platform updates to guarantee consistency in protection, performance, robustness, and usability in a malware landscape that is constantly changing.



More Information


This anti-malware platform update contains the following improvements:
  • Hardening improvements to the anti-malware platform
  • Performance improvements to the anti-malware platform
  • UI improvements to the anti-malware platform
This update also fixes a Windows Defender deadlock issue that is fixed in hotfix 2950183.

Update information

How to obtain this update

Windows Update
This update is available from Windows Update.
Microsoft Download Center
The following files are available for download from the Microsoft Download Center:
Operating systemUpdate
All supported x86-based versions of Windows 8.1Download Download the package now.
All supported x64-based versions of Windows 8.1Download Download the package now.
All supported x86-based versions of Windows 8Download Download the package now.
All supported x64-based versions of Windows 8Download Download the package now.
For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591 How to obtain Microsoft support files from online services
Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.

Prerequisites

To apply this update, you must be running one of the following operating systems:
  • Windows RT 8.1
  • Windows 8.1
  • Windows RT
  • Windows 8

Registry information

To apply this update, you do not have to make any changes to the registry.

Restart requirement

You may have to restart the computer after you apply this update.

Update replacement information

This update replaces the update that is described in Microsoft Knowledge Base (KB) article 2894853. For more information about KB article 2894853, click the following article number to view the article in the Microsoft Knowledge Base:
2894853 Anti-malware platform update for Windows Defender is available in Windows 8, Windows RT, Windows 8.1, and Windows RT 8.1
For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates